Xu, Ben
Cheng, Si-da
Peng, Yi-ji
Zhang, Qian
Article History
Received: 26 August 2020
Accepted: 28 January 2021
First Online: 8 February 2021
Ethics approval and consent to participate
: This experiment was verbally approved by Peking University First Hospital in view of its retrospective nature, without any intervention measures and potential damage on patients.
: Not Applicable.
: None.